Cassville, Wis. — An attorney read from a laptop propped atop a snowplow. To his left was a Caterpillar street grader, and to his right, a dusty workbench. A disheveled American flag hung next to a red toolbox in the center of the impromptu stage. Dozens of southwest Wisconsin residents recently forsook part of the local high school’s track-and-field meet so they could cast their votes inside the town of Cassville’s garage. The attorney had been…